Extremely slow artefact download on high latency links

We have a teamcity server in Europe producing artefacts with sizes between 100Mb and 200Mb. Our European/American users can download these quite fast, in under a minute. Our Australian users however suffer from very slow download speeds, typically 10 to 20 minutes. Latency between Europe and Australia is generally > 200msec, I assume this is the cause.

I have set up an IIS instance on the teamcity server on a different port to exclude any network issues. Downloading the same binaries (to the same Australian workstation) using IIS takes well under 1 minute.

I already followed the instructions in "Known Issues" (1) to no avail. CPU/Memory use is not the issue. Network is fine as well.

This seems to me purely an TeamCity issue. Any ideas on next steps to get this resolved?

Any alternative ways of publishing these artefacts, and still have a working artefact link in the UI?

TeamCity version is 2020.1,

(1) https://www.jetbrains.com/help/teamcity/known-issues.html#Slow+download+from+TeamCity+server